JPH0711990B2 - Touch switch device for discharge lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a discharge lamp lighting device used as, for example, a lighting stand, in which the lighting mode of the discharge lamp is fully turned on and dimmed while being touched. , The present invention relates to a discharge lamp touch switch device that cyclically switches in the order of extinguishing.

[Conventional technology]

In the touch switch device for discharge lamps applied to lighting equipment, the switching circuit causes the human body to contact the touch plate when chattering occurs such that the human body continuously contacts the touch plate twice or more within a short time. Each time, the mode is switched, and a malfunction occurs in which the lighting mode is switched to a lighting mode different from the intended lighting mode. In order to solve such a problem, there is also one that adds a chattering prevention circuit configured to not detect the next touch until a predetermined time elapses after the first touch.

However, if the lighting device has a lighting circuit configuration that cyclically switches the lighting mode, for example, turning off → all lighting → dimming lighting → turning off, for example, we want to shift from the unlit state to the dimmed lighting state. If or
If you want to switch from the dimming lighting state to the full lighting state, it is necessary to touch the touch plate TP _{2 twice} with a hand, etc. at regular intervals, which makes the switching operation of the lighting mode troublesome. It was

Further, in the case where the chattering prevention circuit is provided, the next touch operation is not detected until a predetermined time has elapsed after the first touch operation. Therefore, to change the lighting mode by two. , It is necessary to wait for the predetermined time to elapse after the touch operation is performed once, and then perform the touch operation again, but I do not know how much the predetermined time is, so I tried to switch quickly. When doing, there was a possibility that the lighting mode could not be changed by two.

From this point of view, it is possible to prevent a malfunction in which the lighting mode is changed by two or more due to chattering, and the lighting mode is reliably changed by two or more as needed without repeating the touch operation many times. The following touch switch devices for discharge lamps have been proposed that can be used.

The discharge lamp touch switch device, which is the basis of the present invention, will be described with reference to FIGS. 3 to 5. This discharge lamp touch switch device, as shown in FIG. 3, is a discharge lamp lighting device in which the discharge lamp is in use during a touching period.
It is used to cyclically switch the lighting mode of FL in the order of full lighting, dimming lighting, and extinguishing, and includes a metal touch plate TP ₁ , a touch detection circuit TS _1, and a switching circuit TC _{1 including} , for example, a ternary counter. It is composed of the re-input prohibition circuit KS ₁ .

The touch detection circuit TS ₁ generates a touch detection signal composed of a pulse train of a power supply cycle while the human body or the like is in contact with the touch plate TP ₁ .

The switching circuit TC ₁ cyclically switches the lighting mode every time a touch detection signal is input from the touch detection circuit TS _{1 in} the order of full lighting, dimming lighting, and turning off.

The re-input inhibit circuit KS ₁ is composed of a non-retriggerable normal monostable multivibrator MM ₁ that has a metastable period longer than the pulse train generation period, and becomes a metastable state triggered by a touch detection signal. TC touch detection signal a predetermined time after input to ₁ (re-enter prohibition period), to prohibit re-input to the switching circuit TC ₁ of the touch detection signal.

According to this discharge lamp touch switch device, when a human body or the like comes into contact with the touch plate TP ₁ , a touch detection signal composed of a pulse train of a power supply cycle is generated from the touch detection circuit TS ₁ during the contact period, and the switching circuit TC ₁ is , Each time the touch detection signal is input, the lighting mode is cyclically switched in the order of full lighting, dimming lighting, and unlit. At this time, the re-input inhibit circuit KS ₁ consisting of the normal type monostable multivibrator MM _{1 that} cannot be re-triggered by the touch detection signal is triggered,
Predetermined time after the input of the monostable multivibrator MM ₁ reentry inhibiting circuit KS ₁ metastable state is in touch detection signal;
Re-input of the touch detection signal to the switching circuit TC ₁ is prohibited, and chattering is prevented. Also, if the human body or the like keeps touching the touch plate TP _1, when the metastable period elapses and the stable state is restored, the next pulse of the touch detection signal is input to the switching circuit TC ₁ and the lighting mode is switched. At the same time, the monostable multivibrator MM ₁ enters the metastable state again, and the lighting mode of the switching circuit TC ₁ is cyclically switched every metastable period.

In other words, the monostable multivibrator MM ₁ of the re-input prohibition circuit KS ₁ is in a metastable state, and the re-input prohibition circuit TC ₁ re-inputs the touch detection signal to the switching circuit TC ₁ for a predetermined time (re-input prohibition period) after the touch detection signal is input. is prohibited input, in the case of repeatedly generated in the touch detection signal is short time by chattering also never touch detection signal is input twice or more in succession to the switching circuit TC _1, objective switching circuit TC ₁ It is prohibited to switch to a lighting mode different from the lighting mode of. As a result, it is possible to prevent a malfunction in which the lighting mode changes by two or more due to chattering.

In addition, by continuing to touch the touch plate TP ₁ , the metastable state of the monostable multivibrator MM ₁ changes to the metastable state again in response to the input of the touch detection signal every time the metastable period elapses. If the plate TP ₁ is kept in contact, the lighting mode will change cyclically one by one each time the metastable period of the monostable multivibrator MM ₁ elapses, which is necessary without repeating the touch operation many times. Accordingly, it is possible to reliably change two or more lighting modes.

Hereinafter, a discharge lamp lighting device configured to include the discharge lamp touch switch device will be described in detail.

As shown in FIG. 3, this discharge lamp lighting device comprises a main circuit portion I and the discharge lamp touch switch device II described above.

First, the main circuit portion I is for turning on the discharge lamp FL by using a one-stone inverter circuit INV. Specifically, a DC voltage obtained by rectifying and smoothing the voltage of the commercial power source E with the diode bridge DB and the capacitor C ₁ is applied to the inverter circuit INV, and a high frequency voltage is output from the inverter circuit INV.

This inverter circuit INV consists of inductor L ₂ , capacitor C
₂ , which is composed of a transistor TR ₁ and a diode D ₁ , and turns on and off the transistor TR ₁ to generate a high frequency voltage by a well-known operation. And this inverter circuit
The INV has a discharge lamp FL connected to the output terminal via a ballast choke L ₁ and supplies a high frequency voltage to the discharge lamp FL via the ballast choke L ₁ . C ₃ is a capacitor.

The transistor TR ₁ is switched by the ON / OFF drive signal from the control circuit CO. The control circuit CO controls ON / OFF of the transistor TR ₁ according to the signal from the switching circuit TC ₁ .

On the other hand, in the discharge lamp touch switch device II, a series circuit of resistors R ₄ and R ₅ is connected in parallel to the output end of the diode bridge DB, and a Zener diode ZD ₁ is connected between both ends of the resistor R ₅ . In addition, a resistor R _{3 is connected} to the output end of the diode bridge DB.
The series circuit of capacitor C _{5 and} the series circuit of diodes D ₂ and D ₃ are connected in parallel.

At both ends of the diode D _3, a resistor R ₂ and capacitor C ₄ is plugged in parallel, the connection point of the diodes D _3, D ₄ is connected to the touch plate TP ₁ through the resistor R _1, Further, it is connected to the A terminal of the monostable multivibrator MM ₁ via a waveform shaping element IC ₁ composed of an AND gate.

Further, the T terminal of the monostable multivibrator MM ₁ is connected to the connection point of the resistor R ₃ and the capacitor C ₅ described above, and the Q terminal of the monostable multivibrator MM ₁ is the input of the ternary counter constituting the switching circuit TC _1. The Q ₀ and Q ₁ terminals of the ternary counter are connected to the terminals, and are respectively connected to the control circuit CO described above.

In the above, resistors R ₁ and R ₂ , capacitor C ₄ , diode
D ₂ , D ₃ and the waveform shaping element IC ₁ form a touch detection circuit TS ₁ , and the monostable multivibrator MM ₁ , resistor R ₃ and capacitor C _{5 form a} re-input inhibition circuit KS ₁ .

Next, the circuit operation will be described.

Since the operation of the inverter circuit INV of the main circuit portion I is well known, its explanation is omitted.

The control circuit CO turns on-duty of the transistor TR ₁ of the inverter circuit INV according to the output signal of the discharge lamp touch switch device II, that is, the output signals of the Q ₀ terminal and the Q ₁ terminal of the ternary counter that is the switching circuit TC _1. Has the function of controlling In this case, when the H level extinguishing signal is output from the Q ₀ terminal, the transistor TR ₁ is held off,
The output of the inverter circuit INV is stopped and the discharge lamp FL is turned off. Further, when the H level dimming lighting signal is output from the Q ₁ terminal, the transistor TR ₁ is turned on and off with a small duty to dimming the discharge lamp FL. When both the Q ₀ terminal and the Q ₁ terminal are at the L level, the transistor TR ₁ is turned on and off with a large duty,
Turn on all discharge lamps FL.

Next, the operation of the discharge lamp touch switch device II will be described with reference to FIGS. 4 and 5.

First, the normal operation without chattering will be described with reference to FIG.

In this discharge lamp touch switch device II, as shown in FIG. 4 (a), a touch plate TP ₁ is touched by a human hand, for example, at time t ₁ to induce an oscillating voltage in a commercial cycle at point P _1. It This oscillating voltage is waveform-shaped by the waveform shaping element IC ₁ into a rectangular wave voltage as shown in FIG. 4 (b), and then input to the A terminal of the monostable multivibrator MM ₁ . As a result, the monostable multivibrator MM ₁ generates a rectangular wave voltage having a pulse width TT ₁ as shown in FIG. 4 (c), and this rectangular wave voltage is input to the ternary counter constituting the switching circuit TC _1. To be done. Before time t ₁ , the output of the Q ₀ terminal is H level as shown in FIG. 4 (d), the output of the Q ₁ terminal is L level as shown in FIG. 4 (e), and the discharge lamp If FL is in the off state, both the output of the Q ₀ terminal and the output of the Q ₁ terminal become L level at time t ₁ , and the discharge lamp FL becomes fully lit as shown in FIG. 4 (f). Become.

Then, until the time t ₂ , the human hand continues to touch the touch plate TP ₁ as shown in FIG. 4 (a), so that the rectangular wave voltage of the commercial cycle as shown in FIG. 4 (b) is applied. Although it will continue to be input to the stable multivibrator MM ₁ , regardless of this rectangular wave voltage input, the output voltage of the monostable multivibrator MM ₁ maintains the H level until time t ₃ , and the pulse width TT ₁ During the re-input inhibition period determined by (metastable period), the input to the ternary counter is inhibited, the content of the ternary counter does not change, and therefore the lighting state of the discharge lamp FL does not change.

Then, at time t ₄ ~t _5, by touching FIG. 4 (a) hand example of human touch plate TP _1, as shown in again, the oscillating voltage of the commercial cycle is induced again in _one point P.
This oscillating voltage is waveform-shaped by the waveform shaping element IC ₁ into a rectangular wave voltage as shown in FIG. 4 (b), and then input to the A terminal of the monostable multivibrator MM ₁ . As a result, the monostable multivibrator MM ₁ generates a rectangular wave voltage having a pulse width TT ₁ as shown in FIG. 4 (c), and this rectangular wave voltage is input to the ternary counter constituting the switching circuit TC _1. To be done. Before time t ₄ , the output of the Q ₀ terminal is shown in Fig. 4 (d).
As shown in Fig. 4, the output of the Q ₁ terminal is L level, and the output of Fig.
If the discharge lamp FL is in the fully lit state as shown in ( ₄₎ , both outputs of the Q ₁ terminal become the H level at time t ₄ , and the discharge lamp FL is in the dimming lit state.

After that, the same operation as described above is performed.

If the touch plate TP ₁ is continuously touched until the time t _{3 or} later, the rectangular wave voltage having the pulse width TT ₁ is generated again at the time t ₃ , and this rectangular wave voltage constitutes the switching circuit TC _1. The contents of the ternary counter are changed by one by being input to the advance counter, and the total lighting state is changed to the dimming lighting state. If the touch plate TP ₁ is continuously touched, after that, the lighting mode cyclically changes in the order of turning off → all lighting → dimming lighting → turning off.

Next, the operation when chattering occurs will be described with reference to FIG.

The discharge lamp touch switch apparatus II, by touch plate TP example a human hand ₁ touches at time t ₁₁ as shown in FIG. 5 (a), the oscillating voltage of the commercial cycle is induced to _a point P It This oscillating voltage is waveform-shaped by the waveform shaping element IC ₁ into a rectangular wave voltage as shown in FIG. 5 (b), and then input to the A terminal of the monostable multivibrator MM ₁ . As a result, the monostable multivibrator MM ₁ generates a rectangular wave voltage having a pulse width TT ₁ as shown in FIG. 5 (c), and this rectangular wave voltage is input to the ternary counter constituting the switching circuit TC _1. To be done. Before time t ₁₁ , the output of the Q ₀ terminal is at the H level as shown in FIG. 5 (d), the output of the Q ₁ terminal is at the L level as shown in FIG. 5 (e), and the discharge lamp If FL is off, both the output of the Q ₀ terminal and the output of the Q ₁ terminal become L level at time t ₁₁ , and the discharge lamp FL becomes fully lit as shown in FIG. 5 (f). Become.

Thereafter, the period up to time t _12, since the human hand continues to touch the touch plate TP _1, as shown in FIG. 5 (a), 5
As shown in Figure (b), the rectangular wave voltage of the commercial cycle will continue to be input to the monostable multivibrator MM ₁ .
Regardless of the input of this rectangular wave voltage, the output voltage of the monostable multivibrator MM ₁ maintains the H level until time t _15, and the input to the ternary counter during the re-input inhibit period determined by the pulse width TT ₁ It is prohibited and the contents of the ternary counter do not change, and therefore the lighting state of the discharge lamp FL does not change.

Therefore, commercial cycle at time t ₁₅ the previous example, time t ₁₃ ~t ₁₄ by chattering, by touching FIG. 5 (a) touch plate TP example a human hand _1, as shown in again, the P ₁ two points Even if the oscillating voltage is re-induced and the oscillating voltage is shaped into a rectangular wave voltage as shown in FIG. 5 (b), it may be input to the A terminal of the monostable multivibrator MM _1. The output of the monostable multivibrator MM ₁ does not change, and the state of the switching circuit TC ₁ does not change due to chattering.

This discharge lamp touch switch device II has a touch detection circuit.
A re-input prohibition circuit KS ₁ that prohibits re-input of the touch detection signal for a predetermined time after input of the touch detection signal from TS ₁ is provided, and the state of the switching circuit TC ₁ is changed by the output of the meta-stable state of the re-input prohibition circuit KS _1. As a result, the touch detection signal is prohibited from being input to the switching circuit TC ₁ more than once twice within a short time, and the lighting mode is changed to 2 by chattering.
It is possible to prevent an erroneous operation that changes by more than one.

Such a malfunction prevention measure is that a stable control signal is obtained for a touch signal for a short period of time, and a prohibition section is provided so that there is no transition to the next lighting mode. Since it can be operated by a signal, both operability and prevention of malfunction can be achieved.

Further, since the touch detection circuit TS ₁ outputs a rectangular wave voltage obtained by shaping the waveform of the induced voltage of the commercial cycle, a substantially monostable multi-stable circuit is provided while the human hand or the like touches the touch plate TP _1. Re-input prohibition period determined by the pulse width TT ₁ of the output pulse of the vibrator MM ₁ (eg 0.8 ± 0.3
Every 2 seconds), the lighting mode of the switching circuit TC ₁ is cyclically switched in the order of full lighting, dimming lighting, and extinction. Therefore, in order to switch the lighting mode of the switching circuit TC ₁ , the touch plate TP ₁ It is not necessary to re-touch, and it is possible to easily switch the lighting mode.

In other words, by keeping touching the touch plate TP ₁ , the metastable multi-vibrator MM ₁ changes to the metastable state again in response to the touch detection signal input every time the metastable period of the monostable multivibrator MM ₁ elapses. If the plate TP ₁ is kept in contact, the lighting mode will change cyclically one by one each time the metastable period of the monostable multivibrator MM ₁ elapses, which is necessary without repeating the touch operation many times. Accordingly, it is possible to reliably change two or more lighting modes.

Further, since the lighting mode switching circuit TC ₁ is fixed during the re-input is prohibited, confirmed the lighting mode is easy, a change in securely lighting mode with switched facilitate the desired lighting mode Can be stopped, and the lighting mode does not switch too much.

[Problems to be Solved by the Invention]

In the discharge lamp lighting device, in the case of shifting the discharge lamp FL, for example, the fluorescent lamp from the full lighting state to the dimming lighting state, when the period of the full lighting state is short, when the ambient temperature is low, shift to the dimming lighting state. There was a risk that the fluorescent lamp would later be in a half-wave discharge state or would go out.

On the other hand, in the discharge lamp touch switch device of FIG. 3, by continuously touching the touch plate TP ₁ , the discharge lamp FL,
For example, when the fluorescent lamp is switched from the extinguished state to the full dimming state and then immediately to the dimming lighting state, the pulse width TT ₁ of the output pulse of the monostable multivibrator MM ₁ from the extinguished state
Only during the re-input prohibition period, which is determined by, all lights are turned on.

Therefore, when the above re-input prohibition period is short, when the light-off state is changed to the all-lighting state and then immediately to the dimming lighting state, the fluorescent lamp is in a half-wave discharge state or disappears after shifting to the dimming lighting state. There was a risk of

However, if the re-input prohibition period is set to a length that does not cause half-wave discharge or extinguishing of the fluorescent lamp, this time the operability at the time of shifting from the dimming lighting state to the all lighting state after passing the unlit state will be impaired. become.

An object of the present invention is to prevent half-wave discharge and extinguishing of a discharge lamp in the case of immediately shifting from a light-off state to a dimming lighting state to a dimming lighting state, and at the same time, from a dimming lighting state to a light-off state. It is an object of the present invention to provide a discharge lamp touch switch device capable of improving operability when shifting to a lighting state.

[Means for Solving the Problems]

A touch switch device for a discharge lamp according to the present invention is a touch switch device for a discharge lamp, which cyclically switches a lighting mode of a discharge lamp in a sequence of full lighting, dimming lighting, and turning off during a touching period. And a touch detection circuit that generates a touch detection signal composed of a pulse train of a power supply cycle while a human body or the like is in contact with the touch plate, and cyclically switches the lighting mode each time the touch detection signal is input. A switching circuit and a re-input of the touch detection signal to the switching circuit for a predetermined time after the touch detection signal is input to the switching circuit, which is triggered by the touch detection signal, is prohibited for a period longer than the generation cycle of the pulse train. A re-input prohibition circuit is provided, and the predetermined time when the lighting mode is switched from off to all lighting is adjusted by the discharge lamp. Set to a length sufficient to prevent half-wave discharge and extinction during lighting, and chattering the predetermined time when switching the lighting mode from full lighting to dimming lighting and from dimming lighting to extinction. It is set to the minimum length necessary to prevent it.

[Action]

According to the configuration of the present invention, every time the touch plate is touched by a human body or the like, a touch detection signal is generated from the touch detection circuit and the touch detection signal is input to the switching circuit, the lighting mode is fully lit, dimmed lighting, It will switch cyclically in the order of off.

At this time, the re-input prohibition circuit prohibits re-input of the touch detection signal for a predetermined time after the touch detection signal is input to the switching circuit, so that even if the touch detection signal is repeatedly generated within a short time due to chattering, The touch detection signal is never input to the switching circuit more than once,
The switching circuit will be prohibited from switching to a mode different from the intended mode. As a result, malfunction due to chattering can be prevented.

Further, the predetermined time in the re-input prohibition circuit when switching the lighting mode from off to all lighting is set to a length long enough to prevent half-wave discharge and extinction during dimming lighting of the discharge lamp. Since the above-mentioned predetermined time when switching from full lighting to dimming lighting and from dimming lighting to extinguishing was set to the minimum length necessary to prevent chattering, the lighting mode should be changed from unlit to all lighting. Even if it is switched to dimming lighting immediately after that, it is possible to prevent half-wave discharge and extinguishing at the time of dimming lighting of the discharge lamp, and it is not necessary to switch from dimming lighting to turning off to full lighting without waiting. It is possible to improve the operability when shifting from dimming lighting to full lighting.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, this touch switch device for a discharge lamp has a time setting changing circuit HK ₁ added to that shown in FIG. 3 so that a predetermined time (TT ₂ Half-wave during dimming lighting of the discharge lamp by making the re-input prohibition period) longer than the re-input prohibition period (TT ₃ ) when switching from full lighting to dimming lighting and when switching from dimming lighting to dimming It is set to a length long enough to prevent discharge and extinguishing,
Other configurations and operations are the same as those in FIG.

In this case, the time setting changing circuit HK ₁ reverses the outputs of the Q ₀ terminal and the Q ₁ terminal of the ternary counter which constitutes the switching circuit TC ₁ .
Inverted respectively IC _2, IC _3, and input to the NAND circuit IC ₄ which takes a negative logical product of the output of the inverter IC _2, IC _3, a diode D ₄ and the resistor R ₆ to the output terminal of the NAND circuit IC ₄ It is configured to be connected to the T terminal of the monostable multivibrator MM ₁ via a series.

The operation of the discharge lamp touch switch device including the time setting change circuit HK ₁ will be described below with reference to FIG. When the time t ₂₁ previously assumed to be turned off, the time t _21, t _22, t
_When a hand or the like touches the touch plate TP ₁ at ₂₃ as shown in FIG. 2 (a), a rectangular wave of a commercial cycle is generated from the touch detection circuit TS ₁ as shown in FIG. 2 (b) and monostable. It is input to the A terminal of the multivibrator MM ₁ . As a result, a pulse as shown in FIG. 2 (c) is generated from the Q terminal of the monostable multivibrator MM ₁ .

The switching circuit TC ₁ is configured by the rising edge of the pulse output from the Q terminal of this monostable multivibrator MM _1.
The binary counter changes the output state. Specifically, the second
As shown in FIGS. (D) and (e), for example, at time t ₂₁ , Q ₀
The states of the terminals and Q ₁ terminals change from the H and L states to the L and L states, respectively. As a result, the discharge lamp FL shifts from the extinguishing mode to the full lighting mode, as shown in FIG. 2 (i). Further, the state at the time the t ₂₂ Q ₀ pin and Q ₁ terminal is L, respectively, from the state of the L L, changes the state of the H. As a result, the discharge lamp FL shifts from the full lighting mode to the dimming lighting mode, as shown in FIG. 2 (i). In addition, the time
At t ₂₃ , the states of the Q ₀ and Q ₁ terminals change from the L and H states to the H and L states, respectively. As a result, the discharge lamp FL
Shifts from the dimming lighting mode to the extinguishing mode, as shown in FIG. 2 (i).

On the other hand, the outputs of the inverters IC ₂ and IC ₃ are shown in FIGS. 2 (f) and 2 (g).
As shown in FIG. 2, the states of the Q ₀ terminal and the Q ₁ terminal of the switching circuit TC ₁ are inverted, so that the output of the NAND circuit IC ₄ becomes as shown in FIG. 2 (h). That is, a period of full lighting mode of a time t ₂₁ ~t ₂₂ is the output of the NAND circuit IC ₄ is L, and resistor R ₆ is in a state of being separated from the re-input inhibit circuit KS _1, monostable multivibrator MM The pulse width of the output pulse of ₁ , that is, the re-input inhibition period is the time TT ₂ determined by the time constant of the resistor R ₃ and the capacitor C ₅ . This time TT ₂ is set to be long enough to prevent half-wave discharge and extinction of the discharge lamp FL, for example, set to about 2 seconds.

In addition, the period and the time of the dimming lighting mode of the time t ₂₂ ~t ₂₃
During the extinguishing mode period after t _23, the output of the NAND circuit IC ₄ is H, the resistor R ₆ is connected in parallel with the resistor R _3, and the pulse width of the output pulse of the monostable multivibrator MM ₁ is
That is, during the re-input prohibition period, the resistors R ₃ and R ₆
The time TT ₃ is determined by the time constant of C ₅ . The time TT ₃ is shorter than the time TT _3, the time of minimum required to prevent malfunction due to chattering, and set to, for example, approximately 0.8 seconds, so that improve the operability.

According to this discharge lamp touch switch device, the switching circuit TC
Reentry prohibition circuit KS ₁ mode for inhibiting reentry of the predetermined time the touch detection signal after the input of the touch detection signal to _1, the predetermined time should be inhibited to re-enter the time of switching the lighting mode from off to full lighting Set to a length sufficient to prevent half-wave discharge and extinction during dimming lighting of the discharge lamp FL, and when switching the lighting mode from full lighting to dimming lighting and when switching from dimming lighting to extinction Since the predetermined time is set to the minimum length required to prevent chattering, the following effects are obtained.

That is, by prohibiting the re-input of the touch detection signal until a predetermined time elapses after the touch detection signal is input to the switching circuit TC ₁ , the human body or the like comes into contact with the touch plate twice or more in a short time. When chattering occurs, erroneous operation of switching the lighting mode can be prevented by ignoring the touch detection signal from the second time onward.

In addition, by setting the re-input prohibition time when switching the lighting mode from off to full lighting to a length long enough to prevent half-wave discharge and extinction during dimming lighting of the discharge lamp, In the case of transitioning to the dimming lighting state immediately after the lighting state, the discharge lamp FL
It is possible to secure the time that all are in the full lighting state for a predetermined time or more, and it is possible to prevent half-wave discharge and extinction of the discharge lamp FL when shifting to dimming lighting immediately after lighting, and turn off from dimming lighting. After that, it is possible to quickly switch to full lighting without an unnecessary waiting time, and it is possible to improve operability when shifting from dimming lighting to full lighting.

[Advantages of the Invention] According to the discharge lamp touch switch device of the present invention, a re-input prohibition circuit that prohibits re-input of the touch detection signal for a predetermined time after the touch detection signal is input to the switching circuit is provided, and the lighting mode is changed. The predetermined time for prohibiting re-input when switching from off to full lighting is set to a length long enough to prevent half-wave discharge and extinction during dimming of the discharge lamp, and the lighting mode is adjusted from full lighting. Since the predetermined time for switching to light lighting and for switching from dimming lighting to extinguishment is set to the minimum length necessary to prevent chattering, the following effects are achieved.

That is, by preventing the touch detection signal from being input again until a predetermined time elapses after the touch detection signal is input to the switching circuit, chattering may occur in which a human body or the like contacts the touch plate twice or more in a short time. When it occurs, by ignoring the second and subsequent touch detection signals, it is possible to prevent a malfunction of switching the lighting mode.

Moreover, the re-input prohibition time when switching the lighting mode from off to all lighting is set to a length long enough to prevent half-wave discharge and extinction during dimming lighting of the discharge lamp, and the lighting mode is changed from all lighting to full lighting. By setting the above-mentioned predetermined time when switching to dimming lighting and switching from dimming lighting to the minimum length necessary to prevent chattering, dimming is performed immediately after turning off all lights. When shifting to the lighting state, it is possible to secure the time that the discharge lamp is in the full lighting state for a predetermined time or more, and prevent half-wave discharge and extinction of the discharge lamp when shifting to dimming lighting immediately after lighting. In addition, it is possible to switch from dimming lighting to turning off all lights quickly without unnecessary waiting time. It is possible to improve the operability at the time to.

The above-mentioned malfunction prevention measures are such that a stable control signal can be obtained for a touch signal for a short time, and by providing a prohibition section, there is no transition to the next lighting mode. Since it can be operated by a touch signal, both operability and prevention of malfunction can be achieved.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing the structure of an embodiment of the present invention, and FIG.
1 is a time chart of each part of the circuit shown in FIG. 1, FIG. 3 is a circuit diagram showing the configuration of a touch switch device for a discharge lamp which is the basis of the present invention, and FIG. 4 is a diagram showing a normal operation of the circuit shown in FIG. FIG. 5 is a time chart of each part, and FIG. 5 is a time chart of each part when chattering occurs in the circuit of FIG. TP ₁ …… Touch plate, TS ₁ …… Touch detection circuit, TC ₁
...... Switching circuit, KS ₁ ...... Re-input prohibition circuit, HK ₁ ...... Time setting change circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuo Yokoyama 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Yosuke Kondo, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Inventor Takahiro Hara 404-1 Nishinobu Suise, Himeji City, Hyogo Prefecture Ikeda Electric Co., Ltd. (56) References JP 54-93876 (JP, A) JP 57-37120 (JP, B2)

Claims (1)

[Claims] 1. A touch switch device for a discharge lamp, which cyclically switches the lighting mode of a discharge lamp in the order of full lighting, dimming lighting, and extinction during a touching period, comprising a touch plate and a touch plate. A touch detection circuit that generates a touch detection signal composed of a pulse train of a power cycle during a period when a human body or the like is in contact, a switching circuit that cyclically switches the lighting mode each time the touch detection signal is input, and the touch. A re-input inhibition circuit that inhibits re-input of the touch detection signal to the switching circuit for a predetermined time after the touch detection signal is input to the switching circuit triggered by the detection signal, for a period longer than the generation cycle of the pulse train. The predetermined time when the lighting mode is switched from extinction to full lighting is the half-wave discharge and the half-wave discharge during dimming lighting of the discharge lamp. Set to a length long enough to prevent extinction, and set the minimum time required to prevent chattering when switching the lighting mode from full lighting to dimming lighting and when switching from dimming lighting to extinction. Touch switch device for discharge lamps set to the limit length.